Provided are a pixel driving circuit, a driving method thereof and a display panel. The pixel driving circuit includes a pixel driving module, an ultrasonic driving unit, an ultrasonic sensing unit and a signal acquisition unit. The pixel driving module is configured to drive a light-emitting unit to emit light; the ultrasonic driving unit is configured to provide a signal of a second signal terminal to a first node under control of the second signal terminal; the ultrasonic sensing unit is configured to transmit ultrasonic waves according to signals of the first node and a third power supply terminal, receive reflected ultrasonic echoes and generate a first induction signal at the first node; the signal acquisition unit is configured to output a second induction signal to an output terminal according to a first power supply terminal and first induction signal of the first node under control of the first node.
Legal claims defining the scope of protection, as filed with the USPTO.
3. The pixel driving circuit according to claim 1, further comprising a resetting unit, wherein the resetting unit is respectively connected with the first signal terminal, a fourth power supply terminal and the first electrode of the light-emitting unit, and the resetting unit is configured to provide a signal of the fourth power supply terminal to the first electrode of the light-emitting unit under control of the first signal terminal.
15. A display panel, comprising a plurality of the pixel driving circuits according to claim 1.
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February 24, 2021
May 16, 2023
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